Saturn Sky Forum banner

21 - 39 of 39 Posts

·
Registered
Joined
·
310 Posts
Gramps here with yet another post.
My wife and I find the stiff suspension for performance handing to be a very serious problem.

I realize my desire is unusual, especially on this forum. Has anyone here ever done this, or read of another doing it? I really don't know where to start looking for soft-ride suspension replacements. I don't know the specs to compare.
I have good bad and good news. It's gonna cost you money to pot-hole proof your Sky. But you can do it. And if you do it you'll love the ride.

1. First of all - get rid of Run-On-Flat tires if you have them. They make the car jump around a lot.
2. To pot-hole proof your car you must install the DDMWorks brace bundle. If you have a base you need the sway bars too. It'll make your car heavier so it doesn't bounce so much and it gives the car a smoother and more solid ride.
3. And you need tires that give you a smooth ride (BF Goodrich g-Comp A/S work for me). Inexpensive tires are a recipe for disaster.)

Yes. You can replace the suspension (with OEM from rockauto) - and you might notice a difference.

I doubt that's be enough to make you happy with your car.

If I had to do it one step at a time I'd start with the tires.

If your shocks are yellow - they are OEM.

The last resort solution is to swap out the 18" rims with 17" and get tires with a 55 ratio.
 

·
Premium Member
Joined
·
5,185 Posts
A friend just put on BC Coil overs from DDM I believe. He sat the car up like @Robotech suggested. He set the it on 7 clicks from softest. He loves it. I think I like the NA better for every day driving. Driving the mountain roads aggressively I like the Redline setup a little better.

I am looking at the BC Coil overs to raise my car up a little. I have lowering shocks on it. It is just to low for normal driving in my area. Will let you know how it feels if I do it. Will most likely happen in the next week

I get to drive the Redline and the NA back to back. I have lower springs on the Redline and all of the DDM braces. On the NA it is totally stock.

I don't think 17 inch wheels will work, not enough clearance for the rotors, but not certain on that.

I think the DDM braces make the car far more rigid. I would recommend the tunnel brace for sure. It makes car less flexy and protects the body from twisting.
 

·
Registered
Joined
·
147 Posts
Discussion Starter #23
Does all that "body stiffening" eliminate the convertible top squeaking and body-grunting with every bump? If not, it will be hard to justify many more hundreds into undercarriage plates and bars to stiffen up the body that remains a beast. I really was hoping to buy soft-ride shocks to tame the beast and be done.

As of right now, I have invested just under $1,300 in parts for this car to get it looking right, 28 parts to-date. A new tulip assembly was my biggest expense, followed by new custom gauges from Black Cat Custom. There are a few $100 purchases but the bulk is less than $30 parts...more like like than $20 parts. Unfortunately I don't see the end in sight yet. I might buy new leather seat skins. I've done 3 different vehicles now (one was a Solstice) getting pretty good at the installation.

So far, the core of the car is excellent as evident in driving it home 700 miles from the point of purchase. I will be addressing the brakes solely for cosmetic reasons. They work well, just look ugly. New Bosch QuietCast rotors with the anti-corrosion finish, and of coarse new pads, along with a general caliper and wheel cleanup, will have the wheel areas looking good.

I'd like to make the car "Cruise Night" worthy.
 

·
Premium Member
Joined
·
5,185 Posts
How many miles are on the car?

It is a low priced roadster. Most are noisy and harsh compared to normal cars.

My only answer is to put the top down and enjoy it. You can't hear the squeaks and rattles with the top down. Well at least I can't.

I just put Falken tires on all of my cars and FJ. Have found them to be very good tires, that behave on our freeways and back roads. I run 28 pounds on both the NA and Redline. I took off Michelin SSports or what ever they were called, and Bridgestone RE71R's. Hated the Michelins on the freeways, were total garbage there. The RE 71's destroyed the paint. Will keep them for autocross.

Hoping you figure this out.
 

·
Registered
Joined
·
2,268 Posts
A friend just put on BC Coil overs from DDM I believe. He sat the car up like @Robotech suggested. He set the it on 7 clicks from softest. He loves it. I think I like the NA better for every day driving. Driving the mountain roads aggressively I like the Redline setup a little better.

I am looking at the BC Coil overs to raise my car up a little. I have lowering shocks on it. It is just to low for normal driving in my area. Will let you know how it feels if I do it. Will most likely happen in the next week
I run my BCR shocks at 5 clicks front and 10 clicks rear. Many people set shocks too stiffly and then complain about how the car acts - sounds like your friend isn't one of those!

Make sure that the height gets adjusted the correct way - do it using the wrong adjustment anf you get what the guy in this thread complained about.

 

·
Registered
Joined
·
2,032 Posts
Hey first post here All. rjgramps, check your tire pressure! when I got my 2007 RL a month ago I liked the ride and handling until I freaked when I discovered it was on 20PSI tire pressure. I pumped it to 40 PSI and found it to be very harsh. Down to 32 and will probably lower some more. Find the Goldilocks spot... These low profile tires are sensitive to pressure.
Recommended PSI for SKY tires is 29. And yes, anything above 35 will make the car act squirelly and 40 is crazy high.
111983
pt015.JPG
 

·
Registered
Joined
·
3,969 Posts
Recommended PSI for SKY tires is 29.
I have had the best results between 30 and 32.
For the stock tires (if you still have them) I'd probably agree with John. But every tire make/model is different and it depends on various factors. Here's an interesting thread on a formula to use as a first setting for your tires - which you can then adjust by feel if you like:

 

·
Super Moderator
Joined
·
5,253 Posts
For the stock tires (if you still have them) I'd probably agree with John. But every tire make/model is different and it depends on various factors. Here's an interesting thread on a formula to use as a first setting for your tires - which you can then adjust by feel if you like:

A variation on that formula lets you use information from your current tire to give a better starting point for your new tire.
P1 = Optimum Pressure of Current tire
Pmax1 = Max Pressure of Current Tire
Lmax1 = Max Load of Current Tire
P2 = Starting Pressure of New tire
Pmax2 = Max Pressure of New Tire
Lmax2 = Max Load of New Tire

P2 = P1 * Pmax1 / Lmax1 * Lmax2 / Pmax2

Assuming that you stick with P-metric tires of the same size, the predicted pressures will probably be within 1/2 psi or so. That is, at least, how it has worked out for me with the RS-A, F1-AS, MXM4, and PS-AS3 & 3+ that I have put on my two cars. From RS-A to PS-AS3+, the variance is 0.25 psi, which might as well be zero for a street tire.
 

·
Registered
Joined
·
147 Posts
Discussion Starter #30 (Edited)
OP here,

Answering everyone's.

skersfan: My 2007 Sky base had only 8700 miles when I bought it last month. I drove it home 700 miles so it has 9500 miles today. It appears to have sat outside most of the past 13 years which is why I have so much to do. But it has great potential.

About The Tires: They are not original. They are not run-flat. They are directional, rotating properly. The dealer said he put on new tires last July, and it appears to be so. Three are Mirada date-coded 2017, one is Goodyear date-coded 2015. They are all the right size 245-45-18. It appears the dealer located new/old stock of whatever he could find that was cheapest. I guess new/old stock tires can be found in the hills of NE Georgia.

About PSI: The dealer prep'd the car for me to drive it home. The tires looked fine, but after I had gotten home, I checked the tires to find them at a low 22 psi. I was expecting them to be over-inflated. I don't see outer-edge wear driving 700 miles from the under-inflated condition.

I wonder why my ride home was so rough with under-inflated tires. I did not notice any handling issues. I was actually impressed with the handling. It was a sweet ride other than the suspension being so stiff and the car jarring with every little imperfection in the highway. I wonder if my original shocks (assumed to be original) are so stiff from sitting around outdoors for so long of a time.

About the aftermarket bracing being discussed. One of the brace kits appears to be something that resembles a trailer hitch without the receiver portion. I did find a class-one trailer hitch for the Sky Red-Line, wondering if that will stiffen the rear in a similar manner. I did want a trailer hitch for our two bicycles anyway. CLICK HERE to see the trailer hitch for sale on Ebay for $71 including shipping. I would appreciate everyone's thoughts on this. Anyone here have a trailer hitch on their Sky? If you are very familiar with the differences between a Red-Line and Base exhaust system in-back, do you think this Red-Line hitch will have mounting issues with my base?
 

·
Registered
Joined
·
147 Posts
Discussion Starter #31
One more Question concerning this topic being discussed.
skersfan said:
A friend just put on BC Coil overs from DDM I believe. He sat the car up like @Robotech suggested. He set the it on 7 clicks from softest. He loves it. I think I like the NA better for every day driving. Driving the mountain roads aggressively I like the Redline setup a little better.

I am looking at the BC Coil overs to raise my car up a little. I have lowering shocks on it. It is just to low for normal driving in my area. Will let you know how it feels if I do it. Will most likely happen in the next week
I run my BCR shocks at 5 clicks front and 10 clicks rear. Many people set shocks too stiffly and then complain about how the car acts - sounds like your friend isn't one of those!

Make sure that the height gets adjusted the correct way - do it using the wrong adjustment anf you get what the guy in this thread complained about.

Bc racing coilovers
-----------------------------------------
Are these BC shocks the answer to my complaint of an overly rough ride?
 

·
Super Moderator
Joined
·
5,253 Posts
I am amazed that you had a stable ride at 22psi. Both of mine get really loose below 25, and are somewhat loose below 30.

The ProBeam and the trailer hitch may look similar, but as far as I know the hitch attaches in a completely different place and will not provide any handling improvement.

I have heard of and seen several hitches on Solstices, but none on a Sky that I can remember, but I don't know why it wouldn't work. Our backup light is right there, but I don't think it would interfere.

The difference in the exhausts is the second outlet that the RL has. Otherwise they are the same. A hitch that is not identified as for the RL usually has a gusset that has to be trimmed for the second outlet, but a RL-capable hitch will work on a base without issue.

You may have to ask BC about their shocks, to see if the softest setting is softer than the base. It seems unlikely to me, but they should know.
 

·
Super Moderator
Joined
·
11,186 Posts
One more Question concerning this topic being discussed.

I run my BCR shocks at 5 clicks front and 10 clicks rear. Many people set shocks too stiffly and then complain about how the car acts - sounds like your friend isn't one of those!

Make sure that the height gets adjusted the correct way - do it using the wrong adjustment anf you get what the guy in this thread complained about.
BCs come with a fair set of instructions...once you get past the "instructions originally written in Chinese then passed through Google Translate" nature of them. In short...

DO NOT set ride height using spring preload. Spring preload should be set to 5mm (meaning once you get the spring preload ring set to where the spring cannot be wiggled up and down but no pressure is on the spring, measure from the spring preload ring to the top of the spring. Then tighten the spring preload ring onto the spring until the measurement from the ring to the top of the spring is 5mm shorter than where you started).

Once spring preload is set, you can set ride height by shortening or lengthening the length of the shock buy turning in or out the lower mount on the shock body. Doing it this way allows the piston inside the shock to still have it's full range of motion regardless of how long or short the shock (and thus how high or low the car) is adjusted to.

If you use the spring preload to adjust ride height by allowing the shock to compress before the spring is engaging the upper spring perch or lower spring preload ring, the piston can bottom out inside the shock body causing damage to the shock.
 

·
Super Moderator
Joined
·
5,253 Posts
@Robotech : At their softest setting, do you have any idea how stiff the BC shocks are? @rjgramps asked if they might give him a softer ride than the stock NA setup.

Hmmm: Maybe I should trade my 105k mile NA shocks with him. They have definitely lost some stiffness but still provide a lot of control.
 

·
Registered
Joined
·
2,268 Posts
John, I corresponded with the factory guys in Taiwan in 2009 and IIRC the BCR shocks start about where the stock ones leave off, so the lowest setting will be about the same as a stock shock in a GXP/Redline.

There may be some degree of uncertainty as my conversation by email took place in a hybrid Chinglish, so I wasn't always dead sure I understood what I was being told. They were very cooperative and sent me a set of shocks direct from the factory rather than via a North American dealer (although one was involved to take payment).
 

·
Super Moderator
Joined
·
5,253 Posts
John, I corresponded with the factory guys in Taiwan in 2009 and IIRC the BCR shocks start about where the stock ones leave off, so the lowest setting will be about the same as a stock shock in a GXP/Redline.

There may be some degree of uncertainty as my conversation by email took place in a hybrid Chinglish, so I wasn't always dead sure I understood what I was being told. They were very cooperative and sent me a set of shocks direct from the factory rather than via a North American dealer (although one was involved to take payment).
Thanks, Bill.

That is what i really expected to hear, since there wouldn't be much demand for softer-than-stock racing shocks, but thought it would be worth asking.
 

·
Registered
Joined
·
147 Posts
Discussion Starter #37
I read through your conversation on BC shocks and understand the softest adjustment is comparable to the stock Red-Line/GXP shock. So I will have to accept what I have today. :(
 

·
Super Moderator
Joined
·
5,253 Posts
I read through your conversation on BC shocks and understand the softest adjustment is comparable to the stock Red-Line/GXP shock. So I will have to accept what I have today. :(
Sorry it wasn't what you wanted to hear.

Did you mention a lot of noise when going over bumps? A known problem is friction in the stabilizer bar bushings that can cause a noise. If the friction is enough, it could also add to the harshness of the ride, so you might want to clean and lubricate the bar/bushing interface. There are alternate bushings available that eliminate the noise, but I believe that they are also stiffer.

A nice thing is that cleaning and lubricating won't cost you anything .....
 

·
Super Moderator
Joined
·
11,186 Posts
@Robotech : At their softest setting, do you have any idea how stiff the BC shocks are? @rjgramps asked if they might give him a softer ride than the stock NA setup.
John, I corresponded with the factory guys in Taiwan in 2009 and IIRC the BCR shocks start about where the stock ones leave off, so the lowest setting will be about the same as a stock shock in a GXP/Redline.
I am a horrible person to ask as I like a stiff suspension and I've been on the BCs for about 5 years now. I would say they feel about the same as stock on the NA at their softest setting but honestly, I bet they are stiffer.
 
21 - 39 of 39 Posts
Top